The City Property Association has raised some challenges about key issues in London mayor Boris Johnson's proposed changes to the London Plan. It has challenged how Johnson will fund the works needed to achieve his 60% carbon reduction target by 2025 which are estimated to cost between £40bn and £80bn.

In its formal response to the London Plan review the CPA said: "We are concerned that there is no clear indication of how the required adaptations to existing buildings can be funded. In the current economic climate, it is unlikely that building owner or tenants will be able to raise funds through the normal methods. We are also concerned that any requirement which leads additional costs will act as a further deterrent to new development."

What is the City Property Association? Well:

Since 1904, the CPA has brought together owners of City of London property, enabling them to network, join forces and offer mutual support. The CPA represents the interests of it members to central, regional and local government on issues affecting property in the Square Mile.

That's from the CPA's website. What is Boris's London Plan review? This is (pdf). What do the CPA's concerns mean in the greater scheme of thingS? I'm not exactly sure. I bet Simon Milton (pdf) does, though. Perhaps I'll ask him. Perhaps he'll tell me. Perhaps he won't.